History
Properties and structure
Uses and applications
100
Kevlar was discovered in 1965 by this Dupont chemist while trying to create a lightweight fiber for tires.
Who is Stephanie Kwolek?
100
Kevlar is a type of polymer called an _____, known for its strong bonds and heat resistance.
What is an aramid (aromatic polyamide)?
(Picture above is the chemical structure of Kevlar)
100
Kelvar’s ability to absorb and dispense impact energy makes it perfect for this type of protective gear.
What are bulletproof vests?
200
The discovery of Kevlar was significant because it was both extremely lightweight and _____.
What is durable?
200
Kevlar’s strength comes from these bonds that form between its long parallel polymer chains.
What are hydrogen bonds?
200
Name two other real-world applications of Kevlar besides bulletproof vests.
What are…car breaks, car tires, boats, planes, ropes, or sports equipment?
300
Kevlar is synthesized in a condensation reaction using these two monomers, which produce hydrochloric acid as a byproduct.
What are 1,4 phenylenediamine and terephthaloyl.
300
Kevlar has a melting point of above 500℃ and is resistant to corrosion and many organic solvents. These properties make it ideal for what type of environments?
What are extreme or harsh environments? (high heat, chemical exposure or impact situations)
300
The Production of Kevlar has some economic and environmental issues - name one economic and environmental issue.
What is a high production cost, non-biodegradable, and gas emissions during manufacturing?